This happens sometimes, don't know why, the extractor is active but its window dissapear. Try this if it helps:
1. You need to click on taskbar button of Extractor to make program active, even if you see no window -
IMAGE2. Then you press ALT+SPACE to get window menu in corner of desktop -
IMAGE3. With your arrow key on keyboard choose "Move" from menu, click Enter and move arrow keys to move window